In brief: classifications in brief: enneking classification: benign and malignant tumors of the musculoskeletal system.

Since its establishment in 1959, the American Joint Committee for Cancer (AJCC) has undertaken the responsibility for developing clinically useful staging systems for various types of cancer. The task force on malignant bone tumors of the AJCC could not agree on a satisfactory system and recommended institutions with access to large numbers of patients, consistency in management, and long-term followups undertake this task [2]. In 1980, a system for surgical staging of musculoskeletal sarcoma was proposed, studied, and adopted by the Musculoskeletal Tumor Society and subsequently by the AJCC [4]. This system was established initially at the University of Florida in 1977 based on the data collected from 1968 through 1976 by Dr. William Enneking.